package com.wxy;


import java.util.*;

//演示Collections工具类的使用
public class CollectionsDemo {
    public static void main(String[] args){
        List<String> list = new LinkedList<>();
        Collections.addAll(list,"张三","李四","王五","赵六");
        list.forEach(System.out::println);
        System.out.println("-----------------");

        //打乱集合的顺序
        Collections.shuffle(list);
        list.forEach(System.out::println);
        test1();
    }


    public static void  test1(){
        List<Integer> list = new ArrayList<>();
        Collections.addAll(list,1,2,3,4,5,6,7,8,9,10);
        //按照倒序给集合排序
        Collections.sort(list);
        list.forEach((System.out::println));
        Collections.sort(list, (o1, o2) -> {
            //按照倒叙排
            return o2-o1;
        });
        System.out.println("-----------------");
        list.forEach(System.out::println);
        //学生Student类实现了Comparable接口，这样也能给学生排序
        List<Student> list1 = new ArrayList<>();
        list1.add(new Student("赵六",22));
        list1.add(new Student("张三",25));
        list1.add(new Student("李四",21));
        list1.add(new Student("王五",23));
        Collections.sort(list1);
        list1.forEach(System.out::println);

    }
}
